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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
d972a6ac4c
This patch fixes mesa compiler crash in i965 on shaders like the following one:
```
in VS_OUTPUT {
mat4 data;
} vs_output;
out vec4 fs_output;
vec4 convert(in float val) {
return vec4(val);
}
void main()
{
fs_output = vec4(0.0);
for (int a = -1; a < 5; a++) {
for (int b = -1; b < 5; b++) {
fs_output += convert(vs_output.data[b][a]);
}
}
}
```
Section 5.11 (Out-of-Bounds Accesses) of the GLSL 4.60 spec says:
In the subsections described above for array, vector, matrix and
structure accesses, any out-of-bounds access produced undefined
behavior....
Out-of-bounds reads return undefined values, which
include values from other variables of the active program or zero.
Out-of-bounds writes may be discarded or overwrite
other variables of the active program.
GL_KHR_robustness and GL_ARB_robustness encourage us to return zero
for reads.
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Signed-off-by: Andrii Simiklit <andrii.simiklit@globallogic.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6560>
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| common.py | ||
| meson.build | ||
| meson_options.txt | ||
| README.rst | ||
| REVIEWERS | ||
| SConstruct | ||
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`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `Freenode's #dri-devel <irc://chat.freenode.net#dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.